but now as reporter brian ross reports, such citizen journalism is considered criminal activity in several states. >> wayne, the head of the humane society, said such undercover videos have been the key to tough, new, anti-cruelty laws. >> this led to the largest meat recall in american history. >> and this one which disclosed unsanitary condition at major pork producers. but all of that could be coming to an end. under pressure from the agriculture industry, at least five states now have laws making it a crime to go undercover on farm properties to record videos n iowa the law passed a few months after an abc news report featuring undercover footage as a huge iowa egg factory, taped by the group mercy for animals. >> if somebody comes on somebody else's property through fraud, deception or lying, that is a serious violation of people's rights.